Global Patent Index - EP 1762632 A4

EP 1762632 A4 20080903 - IRON-BASED RARE-EARTH-CONTAINING NANOCOMPOSITE MAGNET AND PROCESS FOR PRODUCING THE SAME

Title (en)

IRON-BASED RARE-EARTH-CONTAINING NANOCOMPOSITE MAGNET AND PROCESS FOR PRODUCING THE SAME

Title (de)

SELTENE ERDEN ENTHALTENDEN NANOKOMPOSIT-MAGNET AUF EISENBASIS UND VERFAHREN ZU DESSEN HERSTELLUNG

Title (fr)

AIMANT NANOCOMPOSITE A BASE DE FER CONTENANT UNE TERRE RARE ET SON PROCEDE DE FABRICATION

Publication

EP 1762632 A4 20080903 (EN)

Application

EP 06729656 A 20060322

Priority

  • JP 2006305689 W 20060322
  • JP 2005086826 A 20050324

Abstract (en)

[origin: EP1762632A1] An iron-based rare-earth nanocomposite magnet according to the present invention includes an Nd 2 Fe 14 B phase and an ±-Fe phase and has a composition represented by the compositional formula: T 100-x-y-z-n (B 1-q C q ) x R y Ti z M n , where T is at least one transition metal element selected from the group consisting of Fe, Co and Ni and always including Fe, R is at least one rare-earth element including substantially no La or Ce, and M is at least one metal element selected from the group consisting of Al, Si, V, Cr, Mn, Cu, Zn, Ga, Zr, Nb, Mo, Ag, Hf, Ta, W, Pt, Au and Pb, and the mole fractions x, y, z, n and q satisfy the inequalities of: 4 at%‰¦x‰¦10 at%, 6 at%‰¦y‰¦10 at%, 0.05 at%‰¦z‰¦5 at%, 0 at%‰¦n‰¦10 at%, and 0.05‰¦q‰¦0.5, respectively. The magnet includes 5 vol% to 60 vol% of ±-Fe phase with an average crystal grain size of 1 nm to 50 nm and 40 vol% to 90 vol% of Nd 2 Fe 14 B phase with an average crystal grain size of 5 nm to 100 nm. A non-magnetic phase including at least Ti and C (carbon) is present on the grain boundary between the ±-Fe and Nd 2 Fe 14 B phases.

IPC 8 full level

B22D 11/06 (2006.01); B22F 3/00 (2006.01); B22F 9/08 (2006.01); C21D 6/00 (2006.01); C22C 1/04 (2006.01); C22C 19/00 (2006.01); C22C 33/02 (2006.01); C22C 38/00 (2006.01); H01F 1/057 (2006.01); H01F 1/058 (2006.01); H01F 41/02 (2006.01)

CPC (source: EP KR US)

B22D 11/0611 (2013.01 - EP US); B22F 9/008 (2013.01 - EP KR); B82Y 25/00 (2013.01 - EP KR); C22C 1/0441 (2013.01 - EP); C22C 33/003 (2013.01 - EP KR); C22C 38/002 (2013.01 - EP KR); C22C 38/005 (2013.01 - EP KR); C22C 38/10 (2013.01 - EP KR); C22C 38/12 (2013.01 - EP KR); C22C 38/14 (2013.01 - EP KR); C22C 45/02 (2013.01 - EP); H01F 1/0579 (2013.01 - EP KR); H01F 1/058 (2013.01 - EP KR); H01F 41/0266 (2013.01 - EP KR); B22F 2998/00 (2013.01 - EP); B22F 2998/10 (2013.01 - EP); H01F 1/0578 (2013.01 - EP)

Citation (search report)

Designated contracting state (EPC)

DE FR GB IT NL

DOCDB simple family (publication)

EP 1762632 A1 20070314; EP 1762632 A4 20080903; EP 1762632 B1 20110525; CN 100507049 C 20090701; CN 1977061 A 20070606; JP 4766045 B2 20110907; JP WO2006101117 A1 20080904; KR 101326930 B1 20131111; KR 20070114330 A 20071203; WO 2006101117 A1 20060928

DOCDB simple family (application)

EP 06729656 A 20060322; CN 200680000416 A 20060322; JP 2006305689 W 20060322; JP 2007509294 A 20060322; KR 20067027601 A 20060322